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36 questions at your level

DifficultyAll Level 2 Level 3 Level 4 Level 5

Modelling assumptions & SI units

36 questions

LessonNot started

A carpenter is making a

2

metre length of wooden handrail.

The cross-section of the handrail is symmetrical about the

x

-axis and is shown in the diagram below, where

x

y

are measured in centimetres.The table below gives values of

y

for the lower half of the cross-section.

$x$	$0$	$1.2$	$2.4$	$3.6$	$4.8$	$6.0$
$y$	$0$	$-2.53$	$-3.01$	$-2.89$	$-2.20$	$0$

Use the trapezium rule, with the values shown in the table above, to find the best estimate for the volume of wood in the handrail.

(5 marks)

●●●●●Level 35 marksStart

Two particles are connected by a light inextensible string passing over a pulley. Explain why the two particles have the same acceleration.

●●●●●Level 31 markStart

State the SI units used for
(a) force,
(b) mass and (c) acceleration.

●●●●●Level 33 marksStart

A ball is kicked and its flight is modelled. State two modelling assumptions commonly made, and the effect of each.

●●●●●Level 32 marksStart